Modelling Infrastructure Services in a Business Service

I'm currently working on a design for a Customer where we provide several Infrastructure related Services, such as WAN, Firewall, Remote Access, etc.. All of these are in essence Technology Services and will be modelled as such, using a cmdb_service CI and the necessary Service Offerings, which in turn will have a 'Contains' relationship to the Component CI's.

However, we have agreed with our Customer a set of Commitments that span the entire set of Technical Services, so we would need to (also?) define these services as Application Services, I guess; So we would then have, for example the following Application Services: 

• Firewall Application Services
• WAN Application Services
• Remote Access Application Services

I'm struggling a bit with the term 'Application' here, as the nature of these services is typically Technology based, and there is not really one single application that is representing the entire stack related to an Application Service...

So how would I define a Business Service Offering, that can provide the desired result? In reality I would need to create a Business Service Offering, that 'depends on' a series of Technical Services, rather than Application Services...

Would this comply with CSDM, or are there any suggestions on how this can/should be modelled?

Would welcome any suggestion on this!